Piston



Feb. 5, 1946. E. M. svi-:TE I v2,394,269

IN VEN TOR.

.Edward /WL Sa/efe ATYD RN EYB E. M svETE Feb. s, 1946.

BIsToN Filed April 21, v1944 2' Sheets-Sheet 2 INVENTOR. Edward M. Svee ATTDRNEYS Patented Feb. 5, 1946 UNITED STATES PAT-ENT OF Fica i The invention relates to an engine, and more especially to a piston yassembly for an internal combustion engine, suction pump, compressor or the like.

The primary object of the invention is the provision of an assembly of this character, wherein an added amount of displacement will be had within a cylinder having interiitting large and small pistons reciprocatingly operating therein, thereby increasing the power of the unit, whether it be an internal combustion engine, suction pump, compressor or the like, with resultant maximum eiciency in the operation thereof.

Another object of the invention is the provision of an assembly of this character, wherein the interitting pistons are actuated in a novel and unique manner, concurrently with each other, one of the pistons being a booster in the working of the power unit.

A further object of the invention is the provision of an assembly of this character, wherein increased power is assured and at the same time less fuel consumption maintained.

A still further object of the invention is the provision of an assembly of this character, which is simple in construction, thoroughly reliable and eiiicient in operation, strong, durable, it being noiseless in the working thereof, and inexpensive to manufacture and install.

With these and other` objects in views the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in the accompanying drawings, which show the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1 is a vertical sectional view of a power unit showing the piston assembly constructed in accordance with the invention applied thereto.

Figure 2 is a view similar to Figure 1 looking at right angles thereto.

Figure 3 is a top plan view of the piston assembly.

h Figure 4 is a bottom plan view of the piston ead.

Figure 5 is a fragmentary sectional view taken on the line 5-5 of Figure 2 looking in the direction of the arrows.

Figure 6 is a sectional view taken on the line 6-6 of Figure 1 looking in the direction of the Figure 7 is a view similar to Figure 3 showing a slight modiiication.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, particularly Figures 1 to inclusive, A designates generally the usual cylinderblock or casing within which the piston reciprooates and which is provided With the head I 0, the cooling of the said block or casing be effected in any selected manner, and the head I0 has tted thereto a spark plug II for location at any point in the combustion chamber which is desired, according to the type of engine in which the piston assembly form ing the present invention is employed.

The piston assembly constituting the present invention,- comprises a master piston head I2 which reciprocates within the block or casing, and through the medium of a wrist pin I3 has connection with a connecting rod or pitman I 4, the latter being connected at l5 to the crank I6 of a crankshaft l'I, as is common or usual.

Built within the piston head I2 is a piston cylinder I8, it being aligned with the longitudinal extent of the block or casing A to one side of the longitudinal central axis of the said head I2, while reciprocatingly fitted in this cylinder I8 is a small piston head I9, auxiliary to the master piston head I2. A connecting rod or pitman 20 has wrist pin connection 2| with this piston head I9, and also eccentric pivotal connection at 22 with a gear 23, which has its center stud axle 24 tted in the connecting rod or pitman I4 for the master piston head I2, the gear 23 being in mesh with a companion gear 25 which is formed in sections bolted or otherwise connected together at 2E about Ythe crank I5 and splined or keyed thereto as at 21, so that on reciprocation of the piston head I9 the crank I6 will be turned by these gears 23 and 25 enmesh with each other.

It should be seen that by the use of the piston assembly as hereinbefore described in an internal combustion engine now used in automobiles, there is afforded an additional amount of piston displacement, and in this fashion increasing the power of the engine.

In Figure 7 of the drawings, there is shown a slight modification of the assembly, wherein the master piston head 28 having several small piston heads 29 interfitted therewith in cylinders built within the latter, and in this manner greater there is shown the manner in which the pistons are operated by providing a second rod or pitman 20 having the eccentric pivoted connection at 22 with the gear 23 which is mounted on the axle 24 fitted in the connecting 'rod or pitman for the motor piston head 28. The operation of the pistons 29 within the piston 28 will be, as previously described.

The assembly constituting the present invention involves the use of a duplex piston arrangement, these being operated in the manner as before stated. In the case of a two-cycle engine, the eiciency and power thereof can be increased cycle internal combustion engine or a four cycle engine or the like.

What is claimed is:

1. In an assembly of the kind described, a cyl- 5 inder, a crank shaft, a composite piston made up of a plurality of pistons intertted with each other and movable independently of one another, a pitman directly connecting one of the pistons with the crank of said shaft, a gear carried by shaftr and :meshing withl` the gear on said pitman,

and a connecting rod connected eccentrically- 'V-.with the rst named gear and also connected Y with the other piston. "15

'2. The invention as describedin claim 1, awherein saidfgcomposite piston comprises several oppositely positioned auxiliary pistons within a main-piston.

' EDWARD M. SVETE. 

